Hapland
It's a series of crazy puzzle games that I found a long time ago, but revisited today. Added to that I still haven't finished the third one (which is a little newer). They're very random, generally you'll need to find out what each thing does, then try and combine them or do things in order. The aim in all of them is to light up the portal. The retry button is in the bottom right corner and believe me you will need it. They're best attempted with a friend, it makes the experience a lot more bearable.
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